Adjustable trolley and guard for electric wires



(No Model.)

L. S. HOYT. I ADJUSTABLE TROLLBY ANDGUARD FOR ELECTRIC WIRES. No. 440,106.

0 9 8 1 4 V 0 N d e u n e u P Y ,6 i j fiww g Z N j p. l

' UNITED STATES PATENT OFFICE.

LEWIS S. HOYT, OF BOSTON, MASSACHUSETTS.

SPECIFICATION forming part of Letters Patent No. 440,106, dated November 4, 1890.

Application filed June 25, 1890. Serial No. 356,598. (No model.) I

To all whom it may concern:

Be it known that I, LEWIS S. HOYT, a citi zen of the United States, and a resident of Boston, in the county of Suffolk and State of Massachusetts, have invented a certain new and useful Improvement in Adjustable Trolley and Guard for Electric Wires, of which the following, taken in connection with the accompanying drawings, is a specification.

The object of my invention is the production of a self-adjusting trolley, supportingframe, and guard combined. Said aggregated devices I entitle an adjustable trolley and guard for electric tramway-wires.

My improved invention to this end comprises a journal-frame provided with a slotted socket to permit a semi-diameter revolution or less around the supporting trolley-pole, right and left pairs of inclosing-disks, the outer of which are provided with lugs to form a parallel support against said journal-frame, and the spiral springs therein, which comprise the guard.

My invention is designed to keep the trolley within the plane of the wire beneath which it runs and to obviate any tendency it may have to leave the same. PracticallyI secure the efiect of an extended (trolley) flange, but without any rotating movement, while the resillient action of the spring-guard permits the easy passage of the trolley beneath the lateral supporting-Wires or other adjuncts of the overhead system of electric wires as applied to tramways, while in the semirotation of the journal-frame I secure the adjustment necessary to facilitate the passage of the trolley around curves and switches.

In the application of my invention it should not be confounded with the erewhile inventions designated as trolley-finders, as it in no sense acts in such capacity, but is solely intended to prevent the tendency of the trolley to jump or leave its wire while the car is in motion. The further elucidation of my invention, its application, and construction will be ascertained through reference to the drawings forming a part of this specification, in which- Figure I is a view in perspective of my improved trolley and guard. Fig. II designates the inclosing-disks, the outer 'one of which contains the spring-guard. Fig. III indicates a longitudinal central section through the assembled devices forming my invention.-

Similar letters indicate like parts in the various figures, referring to which- A designates .my improved trolley in its entirety, and B the shank of the journal-frame having a recess 0 to receive the end of the trolley lever or pole D, fitted to semi-rotate within said shank, the latter having the circumferential slot E, through which is projected the stop screw or pin F, circumscribing the rotation of the trolley. The upper portion of said frame forms the j ournal', which is pierced at G in the ordinary manner to receive the shaft H, on which the trolley I revolves.

J indicates the external disk centrally perforated to receive said shaft and provided with an inturned rim K, extending from onehalf to three-quarters of its circumference. The internal fiat disk L, also similarly perforated, receives the rim K when the disks are in juxtaposition, and a circumferential opening is thus formed, as at M, to allow the prescribed rotation of the protruding springguard N as it is pressed downward by any obstacle in its path. The disk J is further provided exteriorly with lugs O O, fitted to slide against the sides of the journal-frame when the disks are assembled and there held firmly in position through the agency of the shaft H, which is suitably shouldered, substantially as illustrated.

To prevent the rotation of the internal disk L, a square hub P is projected around the central (shaft) opening, which fits within a cor responding hub Q, similarly situated in the disk J, and which hub also receives and secures the end of the spiral-spring guard surrounding it, as observed at R.

I would add that the internal disk L, with the aid of the shoulders S S, precludes all possibility of friction against the trolley I, which is designed to revolve freely around the shaft,

which is splined in the journal in the ordinary way.

In the organization of my invention the springguards are properly secured between the disks, which are then placed against the sides of the trolley. The latter is then placed in its journal, the shaft pushed through and the nut, thus holding the parts secured by firmly in position. The shank is now seated upon the pole and pin or screw fixed in the same, completing the operation.

Having ascertained the nature and construction of my invention, I Wish to secure by Letters Patent and I claim 1. A self-adjusting trolley for electric Wires on trarnways, mounted Within a journal-frame having a recessed shank, a circumferential slot therein, and a screw or pin to circumscribe its.rotation and to attach said journal to the trolley-pole, substantially as specified.

2. The combination, with a trolley provided with a hollow-shanked j ournal-frame, of a pair of double disks adapted to inclose a springguard and to secure the same Without rotation against the sides of said trolley, substantially in the manner described.

'0 and the disks set forth.

LEWIS S. HOYT.

Witnesses:

CHAS. HALL ADAMS, G. W. TROWBRIDGE. 

